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News Thread and Theme Detection

Author: LiFeng
Tutor: LiFang
School: Shanghai Jiaotong University
Course: Applied Computer Technology
Keywords: Event cued Cues and themes Topic Structure Mixed connection NMF Clustering
CLC: TP391.3
Type: Master's thesis
Year: 2008
Downloads: 146
Quote: 1
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Abstract


Network news has become the age of the Internet for people to obtain information , the main channel of the world . But as with the other network resources , there is the problem of information overload . The successful application of existing information retrieval - search engines , initially solved the users to quickly access the information they want . With a powerful search function , the user can quickly find the news events of concern . But for the impact of large , complex background events , news listed Organization ( news classification ) has been unable to meet the requirements of the age of the Internet it is quickly absorbed understand information . Automatically find the topic within the structure , to help users understand the grasp global overview of the event and the ins and outs , to sort out the internal logic of the event , and to become a current research focus . This paper topic structured , gives his own definition , that a topic of automatic organization consists of the following four points : a topic of a number of development clue ; theme of each development clues to the formation of multiple events ; topics and themes has a causal link and refinement of contact between the influence ( degrees) ; different themes . According to this definition , we are the first to use the clues to the topic named entity - based single-pass incremental clustering , clustering , we propose a hybrid join algorithm Unlike single connection and connection ; then we use each clue NMF clustering clues contained themes ; then based on similarity and whether the co-occurrence calculated the correlation of the theme ; the last news topic contains the number and the number of related topics , introduced the theme degrees . Used RSS news article online news publishing technologies and open source full-text search engine Lucene implemented a prototype system . And designed a series of experiments to verify the effectiveness of the two core clustering algorithm .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Retrieval machine
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